Juan thinks that the participation of professionals is not in accord, but Michiko thinks it is—this is the disagreement. This is because Juan thinks that fairness is the key ideal of the Olympics, but Michiko thinks the Olympics are about displaying athletic excellence.

Juan claims in passing that amateurs and professionals did not both compete in the ancient Olympics, but Michiko neither agrees nor disagrees. Michiko just talks about the modern Olympics.

Neither speaker actually says whether modern Olympic athletes are the world’s best or not. Michiko indicates that they should be the best, but even then doesn’t discuss whether that reflect reality.

Neither speaker makes an absolute claim that no amateurs have the same resources as professionals. Juan says that amateurs “rarely” have those resources, and Michiko says nothing at all about who has resources.

Neither speaker mentions government sponsorship of athletes at all.